Bug 510008
| Summary: | [Emulex 5.4 bug] Lower throughput seen on be2net with MSIx interrupt | ||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Subbu Seetharaman <subbu.seetharaman> | ||||
| Component: | kernel | Assignee: | Andy Gospodarek <agospoda> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | high | Docs Contact: | |||||
| Priority: | high | ||||||
| Version: | 5.4 | CC: | andriusb, bobby.suber, dzickus, laurie.barry, lwang, mgahagan, peterm, sandy.garza, sean.murphy, syeghiay, tcamuso | ||||
| Target Milestone: | rc | Keywords: | OtherQA, Regression | ||||
| Target Release: | 5.4 | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2009-09-02 08:15:26 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 461676 | ||||||
| Attachments: |
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Description
Subbu Seetharaman
2009-07-07 12:08:53 UTC
Subbu - is this the final issue found during testing? There are no other known issues. We a few more test cases left. We have a fix ready for this problem; but since some of the patches that I had uploaded earlier are not yet applied, I am not sure what source base should this patch be against. Should I wait for the earlier patches to be applied ? Please let me know. Thanks. Subbu Never mind. Looks like all changes have been applied to 157 source. We will make the patch relative to source in 157. Subbu Created attachment 351068 [details]
patch to fix the perfoemance problem seen with MSIx.
This patch fixes a problem where with MSIX where we may return without clearing interrupt which will cause us to return to ISR bringing performance down due to too many interrupts.
This bug was introduced as part of the changes to fix for 508839. This problem does not exist in the upstream driver and hence will not be submitted to upstream.
Subbu
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. in kernel-2.6.18-158.el5 You can download this test kernel from http://people.redhat.com/dzickus/el5 Please do NOT transition this bugzilla state to VERIFIED until our QE team has sent specific instructions indicating when to do so. However feel free to provide a comment indicating that this fix has been verified. Fix verified in kernel-2.6.18-158.el5. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1243.html Andrius, Was this bug fixed for RHEL5.4 GA or redirected to a post RHEL5.4 errata kernel? Laurie This was fixed in RHEL 5.4 GA. (included in Snapshot 3) |